1 /* 2 * Copyright (c) 1999, 2022, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2014, 2021, Red Hat Inc. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #include "precompiled.hpp" 27 #include "asm/assembler.hpp" 28 #include "c1/c1_CodeStubs.hpp" 29 #include "c1/c1_Defs.hpp" 30 #include "c1/c1_MacroAssembler.hpp" 31 #include "c1/c1_Runtime1.hpp" 32 #include "compiler/disassembler.hpp" 33 #include "compiler/oopMap.hpp" 34 #include "gc/shared/cardTable.hpp" 35 #include "gc/shared/cardTableBarrierSet.hpp" 36 #include "gc/shared/collectedHeap.hpp" 37 #include "gc/shared/tlab_globals.hpp" 38 #include "interpreter/interpreter.hpp" 39 #include "memory/universe.hpp" 40 #include "nativeInst_aarch64.hpp" 41 #include "oops/compiledICHolder.hpp" 42 #include "oops/oop.inline.hpp" 43 #include "prims/jvmtiExport.hpp" 44 #include "register_aarch64.hpp" 45 #include "runtime/sharedRuntime.hpp" 46 #include "runtime/signature.hpp" 47 #include "runtime/stubRoutines.hpp" 48 #include "runtime/vframe.hpp" 49 #include "runtime/vframeArray.hpp" 50 #include "utilities/powerOfTwo.hpp" 51 #include "vmreg_aarch64.inline.hpp" 52 53 54 // Implementation of StubAssembler 55 56 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, int args_size) { 57 // setup registers 58 assert(!(oop_result1->is_valid() || metadata_result->is_valid()) || oop_result1 != metadata_result, "registers must be different"); 59 assert(oop_result1 != rthread && metadata_result != rthread, "registers must be different"); 60 assert(args_size >= 0, "illegal args_size"); 61 bool align_stack = false; 62 63 mov(c_rarg0, rthread); 64 set_num_rt_args(0); // Nothing on stack 65 66 Label retaddr; 67 set_last_Java_frame(sp, rfp, retaddr, rscratch1); 68 69 // do the call 70 lea(rscratch1, RuntimeAddress(entry)); 71 blr(rscratch1); 72 bind(retaddr); 73 int call_offset = offset(); 74 // verify callee-saved register 75 #ifdef ASSERT 76 push(r0, sp); 77 { Label L; 78 get_thread(r0); 79 cmp(rthread, r0); 80 br(Assembler::EQ, L); 81 stop("StubAssembler::call_RT: rthread not callee saved?"); 82 bind(L); 83 } 84 pop(r0, sp); 85 #endif 86 reset_last_Java_frame(true); 87 88 // check for pending exceptions 89 { Label L; 90 // check for pending exceptions (java_thread is set upon return) 91 ldr(rscratch1, Address(rthread, in_bytes(Thread::pending_exception_offset()))); 92 cbz(rscratch1, L); 93 // exception pending => remove activation and forward to exception handler 94 // make sure that the vm_results are cleared 95 if (oop_result1->is_valid()) { 96 str(zr, Address(rthread, JavaThread::vm_result_offset())); 97 } 98 if (metadata_result->is_valid()) { 99 str(zr, Address(rthread, JavaThread::vm_result_2_offset())); 100 } 101 if (frame_size() == no_frame_size) { 102 leave(); 103 far_jump(RuntimeAddress(StubRoutines::forward_exception_entry())); 104 } else if (_stub_id == Runtime1::forward_exception_id) { 105 should_not_reach_here(); 106 } else { 107 far_jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id))); 108 } 109 bind(L); 110 } 111 // get oop results if there are any and reset the values in the thread 112 if (oop_result1->is_valid()) { 113 get_vm_result(oop_result1, rthread); 114 } 115 if (metadata_result->is_valid()) { 116 get_vm_result_2(metadata_result, rthread); 117 } 118 return call_offset; 119 } 120 121 122 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) { 123 mov(c_rarg1, arg1); 124 return call_RT(oop_result1, metadata_result, entry, 1); 125 } 126 127 128 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) { 129 if (c_rarg1 == arg2) { 130 if (c_rarg2 == arg1) { 131 mov(rscratch1, arg1); 132 mov(arg1, arg2); 133 mov(arg2, rscratch1); 134 } else { 135 mov(c_rarg2, arg2); 136 mov(c_rarg1, arg1); 137 } 138 } else { 139 mov(c_rarg1, arg1); 140 mov(c_rarg2, arg2); 141 } 142 return call_RT(oop_result1, metadata_result, entry, 2); 143 } 144 145 146 int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) { 147 // if there is any conflict use the stack 148 if (arg1 == c_rarg2 || arg1 == c_rarg3 || 149 arg2 == c_rarg1 || arg2 == c_rarg3 || 150 arg3 == c_rarg1 || arg3 == c_rarg2) { 151 stp(arg3, arg2, Address(pre(sp, -2 * wordSize))); 152 stp(arg1, zr, Address(pre(sp, -2 * wordSize))); 153 ldp(c_rarg1, zr, Address(post(sp, 2 * wordSize))); 154 ldp(c_rarg3, c_rarg2, Address(post(sp, 2 * wordSize))); 155 } else { 156 mov(c_rarg1, arg1); 157 mov(c_rarg2, arg2); 158 mov(c_rarg3, arg3); 159 } 160 return call_RT(oop_result1, metadata_result, entry, 3); 161 } 162 163 enum return_state_t { 164 does_not_return, requires_return 165 }; 166 167 168 // Implementation of StubFrame 169 170 class StubFrame: public StackObj { 171 private: 172 StubAssembler* _sasm; 173 bool _return_state; 174 175 public: 176 StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments, return_state_t return_state=requires_return); 177 void load_argument(int offset_in_words, Register reg); 178 179 ~StubFrame(); 180 };; 181 182 void StubAssembler::prologue(const char* name, bool must_gc_arguments) { 183 set_info(name, must_gc_arguments); 184 enter(); 185 } 186 187 void StubAssembler::epilogue() { 188 leave(); 189 ret(lr); 190 } 191 192 #define __ _sasm-> 193 194 StubFrame::StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments, return_state_t return_state) { 195 _sasm = sasm; 196 _return_state = return_state; 197 __ prologue(name, must_gc_arguments); 198 } 199 200 // load parameters that were stored with LIR_Assembler::store_parameter 201 // Note: offsets for store_parameter and load_argument must match 202 void StubFrame::load_argument(int offset_in_words, Register reg) { 203 __ load_parameter(offset_in_words, reg); 204 } 205 206 StubFrame::~StubFrame() { 207 if (_return_state == requires_return) { 208 __ epilogue(); 209 } else { 210 __ should_not_reach_here(); 211 } 212 } 213 214 #undef __ 215 216 217 // Implementation of Runtime1 218 219 #define __ sasm-> 220 221 const int float_regs_as_doubles_size_in_slots = pd_nof_fpu_regs_frame_map * 2; 222 223 // Stack layout for saving/restoring all the registers needed during a runtime 224 // call (this includes deoptimization) 225 // Note: note that users of this frame may well have arguments to some runtime 226 // while these values are on the stack. These positions neglect those arguments 227 // but the code in save_live_registers will take the argument count into 228 // account. 229 // 230 231 enum reg_save_layout { 232 reg_save_frame_size = 32 /* float */ + 32 /* integer */ 233 }; 234 235 // Save off registers which might be killed by calls into the runtime. 236 // Tries to smart of about FP registers. In particular we separate 237 // saving and describing the FPU registers for deoptimization since we 238 // have to save the FPU registers twice if we describe them. The 239 // deopt blob is the only thing which needs to describe FPU registers. 240 // In all other cases it should be sufficient to simply save their 241 // current value. 242 243 static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs]; 244 static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs]; 245 static int reg_save_size_in_words; 246 static int frame_size_in_bytes = -1; 247 248 static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) { 249 int frame_size_in_bytes = reg_save_frame_size * BytesPerWord; 250 sasm->set_frame_size(frame_size_in_bytes / BytesPerWord); 251 int frame_size_in_slots = frame_size_in_bytes / sizeof(jint); 252 OopMap* oop_map = new OopMap(frame_size_in_slots, 0); 253 254 for (int i = 0; i < FrameMap::nof_cpu_regs; i++) { 255 Register r = as_Register(i); 256 if (i <= 18 && i != rscratch1->encoding() && i != rscratch2->encoding()) { 257 int sp_offset = cpu_reg_save_offsets[i]; 258 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset), 259 r->as_VMReg()); 260 } 261 } 262 263 if (save_fpu_registers) { 264 for (int i = 0; i < FrameMap::nof_fpu_regs; i++) { 265 FloatRegister r = as_FloatRegister(i); 266 { 267 int sp_offset = fpu_reg_save_offsets[i]; 268 oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset), 269 r->as_VMReg()); 270 } 271 } 272 } 273 return oop_map; 274 } 275 276 static OopMap* save_live_registers(StubAssembler* sasm, 277 bool save_fpu_registers = true) { 278 __ block_comment("save_live_registers"); 279 280 __ push(RegSet::range(r0, r29), sp); // integer registers except lr & sp 281 282 if (save_fpu_registers) { 283 for (int i = 31; i>= 0; i -= 4) { 284 __ sub(sp, sp, 4 * wordSize); // no pre-increment for st1. Emulate it without modifying other registers 285 __ st1(as_FloatRegister(i-3), as_FloatRegister(i-2), as_FloatRegister(i-1), 286 as_FloatRegister(i), __ T1D, Address(sp)); 287 } 288 } else { 289 __ add(sp, sp, -32 * wordSize); 290 } 291 292 return generate_oop_map(sasm, save_fpu_registers); 293 } 294 295 static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) { 296 if (restore_fpu_registers) { 297 for (int i = 0; i < 32; i += 4) 298 __ ld1(as_FloatRegister(i), as_FloatRegister(i+1), as_FloatRegister(i+2), 299 as_FloatRegister(i+3), __ T1D, Address(__ post(sp, 4 * wordSize))); 300 } else { 301 __ add(sp, sp, 32 * wordSize); 302 } 303 304 __ pop(RegSet::range(r0, r29), sp); 305 } 306 307 static void restore_live_registers_except_r0(StubAssembler* sasm, bool restore_fpu_registers = true) { 308 309 if (restore_fpu_registers) { 310 for (int i = 0; i < 32; i += 4) 311 __ ld1(as_FloatRegister(i), as_FloatRegister(i+1), as_FloatRegister(i+2), 312 as_FloatRegister(i+3), __ T1D, Address(__ post(sp, 4 * wordSize))); 313 } else { 314 __ add(sp, sp, 32 * wordSize); 315 } 316 317 __ ldp(zr, r1, Address(__ post(sp, 16))); 318 __ pop(RegSet::range(r2, r29), sp); 319 } 320 321 322 323 void Runtime1::initialize_pd() { 324 int i; 325 int sp_offset = 0; 326 327 // all float registers are saved explicitly 328 assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here"); 329 for (i = 0; i < FrameMap::nof_fpu_regs; i++) { 330 fpu_reg_save_offsets[i] = sp_offset; 331 sp_offset += 2; // SP offsets are in halfwords 332 } 333 334 for (i = 0; i < FrameMap::nof_cpu_regs; i++) { 335 Register r = as_Register(i); 336 cpu_reg_save_offsets[i] = sp_offset; 337 sp_offset += 2; // SP offsets are in halfwords 338 } 339 } 340 341 342 // target: the entry point of the method that creates and posts the exception oop 343 // has_argument: true if the exception needs arguments (passed in rscratch1 and rscratch2) 344 345 OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) { 346 // make a frame and preserve the caller's caller-save registers 347 OopMap* oop_map = save_live_registers(sasm); 348 int call_offset; 349 if (!has_argument) { 350 call_offset = __ call_RT(noreg, noreg, target); 351 } else { 352 __ mov(c_rarg1, rscratch1); 353 __ mov(c_rarg2, rscratch2); 354 call_offset = __ call_RT(noreg, noreg, target); 355 } 356 OopMapSet* oop_maps = new OopMapSet(); 357 oop_maps->add_gc_map(call_offset, oop_map); 358 return oop_maps; 359 } 360 361 362 OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler *sasm) { 363 __ block_comment("generate_handle_exception"); 364 365 // incoming parameters 366 const Register exception_oop = r0; 367 const Register exception_pc = r3; 368 // other registers used in this stub 369 370 // Save registers, if required. 371 OopMapSet* oop_maps = new OopMapSet(); 372 OopMap* oop_map = NULL; 373 switch (id) { 374 case forward_exception_id: 375 // We're handling an exception in the context of a compiled frame. 376 // The registers have been saved in the standard places. Perform 377 // an exception lookup in the caller and dispatch to the handler 378 // if found. Otherwise unwind and dispatch to the callers 379 // exception handler. 380 oop_map = generate_oop_map(sasm, 1 /*thread*/); 381 382 // load and clear pending exception oop into r0 383 __ ldr(exception_oop, Address(rthread, Thread::pending_exception_offset())); 384 __ str(zr, Address(rthread, Thread::pending_exception_offset())); 385 386 // load issuing PC (the return address for this stub) into r3 387 __ ldr(exception_pc, Address(rfp, 1*BytesPerWord)); 388 __ authenticate_return_address(exception_pc, rscratch1); 389 390 // make sure that the vm_results are cleared (may be unnecessary) 391 __ str(zr, Address(rthread, JavaThread::vm_result_offset())); 392 __ str(zr, Address(rthread, JavaThread::vm_result_2_offset())); 393 break; 394 case handle_exception_nofpu_id: 395 case handle_exception_id: 396 // At this point all registers MAY be live. 397 oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id); 398 break; 399 case handle_exception_from_callee_id: { 400 // At this point all registers except exception oop (r0) and 401 // exception pc (lr) are dead. 402 const int frame_size = 2 /*fp, return address*/; 403 oop_map = new OopMap(frame_size * VMRegImpl::slots_per_word, 0); 404 sasm->set_frame_size(frame_size); 405 break; 406 } 407 default: ShouldNotReachHere(); 408 } 409 410 // verify that only r0 and r3 are valid at this time 411 __ invalidate_registers(false, true, true, false, true, true); 412 // verify that r0 contains a valid exception 413 __ verify_not_null_oop(exception_oop); 414 415 #ifdef ASSERT 416 // check that fields in JavaThread for exception oop and issuing pc are 417 // empty before writing to them 418 Label oop_empty; 419 __ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset())); 420 __ cbz(rscratch1, oop_empty); 421 __ stop("exception oop already set"); 422 __ bind(oop_empty); 423 424 Label pc_empty; 425 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset())); 426 __ cbz(rscratch1, pc_empty); 427 __ stop("exception pc already set"); 428 __ bind(pc_empty); 429 #endif 430 431 // save exception oop and issuing pc into JavaThread 432 // (exception handler will load it from here) 433 __ str(exception_oop, Address(rthread, JavaThread::exception_oop_offset())); 434 __ str(exception_pc, Address(rthread, JavaThread::exception_pc_offset())); 435 436 // patch throwing pc into return address (has bci & oop map) 437 __ protect_return_address(exception_pc, rscratch1); 438 __ str(exception_pc, Address(rfp, 1*BytesPerWord)); 439 440 // compute the exception handler. 441 // the exception oop and the throwing pc are read from the fields in JavaThread 442 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc)); 443 oop_maps->add_gc_map(call_offset, oop_map); 444 445 // r0: handler address 446 // will be the deopt blob if nmethod was deoptimized while we looked up 447 // handler regardless of whether handler existed in the nmethod. 448 449 // only r0 is valid at this time, all other registers have been destroyed by the runtime call 450 __ invalidate_registers(false, true, true, true, true, true); 451 452 // patch the return address, this stub will directly return to the exception handler 453 __ protect_return_address(r0, rscratch1); 454 __ str(r0, Address(rfp, 1*BytesPerWord)); 455 456 switch (id) { 457 case forward_exception_id: 458 case handle_exception_nofpu_id: 459 case handle_exception_id: 460 // Restore the registers that were saved at the beginning. 461 restore_live_registers(sasm, id != handle_exception_nofpu_id); 462 break; 463 case handle_exception_from_callee_id: 464 break; 465 default: ShouldNotReachHere(); 466 } 467 468 return oop_maps; 469 } 470 471 472 void Runtime1::generate_unwind_exception(StubAssembler *sasm) { 473 // incoming parameters 474 const Register exception_oop = r0; 475 // callee-saved copy of exception_oop during runtime call 476 const Register exception_oop_callee_saved = r19; 477 // other registers used in this stub 478 const Register exception_pc = r3; 479 const Register handler_addr = r1; 480 481 // verify that only r0, is valid at this time 482 __ invalidate_registers(false, true, true, true, true, true); 483 484 #ifdef ASSERT 485 // check that fields in JavaThread for exception oop and issuing pc are empty 486 Label oop_empty; 487 __ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset())); 488 __ cbz(rscratch1, oop_empty); 489 __ stop("exception oop must be empty"); 490 __ bind(oop_empty); 491 492 Label pc_empty; 493 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset())); 494 __ cbz(rscratch1, pc_empty); 495 __ stop("exception pc must be empty"); 496 __ bind(pc_empty); 497 #endif 498 499 // Save our return address because 500 // exception_handler_for_return_address will destroy it. We also 501 // save exception_oop 502 __ mov(r3, lr); 503 __ protect_return_address(); 504 __ stp(lr, exception_oop, Address(__ pre(sp, -2 * wordSize))); 505 506 // search the exception handler address of the caller (using the return address) 507 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), rthread, r3); 508 // r0: exception handler address of the caller 509 510 // Only R0 is valid at this time; all other registers have been 511 // destroyed by the call. 512 __ invalidate_registers(false, true, true, true, false, true); 513 514 // move result of call into correct register 515 __ mov(handler_addr, r0); 516 517 // get throwing pc (= return address). 518 // lr has been destroyed by the call 519 __ ldp(lr, exception_oop, Address(__ post(sp, 2 * wordSize))); 520 __ authenticate_return_address(); 521 __ mov(r3, lr); 522 523 __ verify_not_null_oop(exception_oop); 524 525 // continue at exception handler (return address removed) 526 // note: do *not* remove arguments when unwinding the 527 // activation since the caller assumes having 528 // all arguments on the stack when entering the 529 // runtime to determine the exception handler 530 // (GC happens at call site with arguments!) 531 // r0: exception oop 532 // r3: throwing pc 533 // r1: exception handler 534 __ br(handler_addr); 535 } 536 537 538 539 OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) { 540 // use the maximum number of runtime-arguments here because it is difficult to 541 // distinguish each RT-Call. 542 // Note: This number affects also the RT-Call in generate_handle_exception because 543 // the oop-map is shared for all calls. 544 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 545 assert(deopt_blob != NULL, "deoptimization blob must have been created"); 546 547 OopMap* oop_map = save_live_registers(sasm); 548 549 __ mov(c_rarg0, rthread); 550 Label retaddr; 551 __ set_last_Java_frame(sp, rfp, retaddr, rscratch1); 552 // do the call 553 __ lea(rscratch1, RuntimeAddress(target)); 554 __ blr(rscratch1); 555 __ bind(retaddr); 556 OopMapSet* oop_maps = new OopMapSet(); 557 oop_maps->add_gc_map(__ offset(), oop_map); 558 // verify callee-saved register 559 #ifdef ASSERT 560 { Label L; 561 __ get_thread(rscratch1); 562 __ cmp(rthread, rscratch1); 563 __ br(Assembler::EQ, L); 564 __ stop("StubAssembler::call_RT: rthread not callee saved?"); 565 __ bind(L); 566 } 567 #endif 568 569 __ reset_last_Java_frame(true); 570 571 #ifdef ASSERT 572 // check that fields in JavaThread for exception oop and issuing pc are empty 573 Label oop_empty; 574 __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset())); 575 __ cbz(rscratch1, oop_empty); 576 __ stop("exception oop must be empty"); 577 __ bind(oop_empty); 578 579 Label pc_empty; 580 __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset())); 581 __ cbz(rscratch1, pc_empty); 582 __ stop("exception pc must be empty"); 583 __ bind(pc_empty); 584 #endif 585 586 // Runtime will return true if the nmethod has been deoptimized, this is the 587 // expected scenario and anything else is an error. Note that we maintain a 588 // check on the result purely as a defensive measure. 589 Label no_deopt; 590 __ cbz(r0, no_deopt); // Have we deoptimized? 591 592 // Perform a re-execute. The proper return address is already on the stack, 593 // we just need to restore registers, pop all of our frame but the return 594 // address and jump to the deopt blob. 595 restore_live_registers(sasm); 596 __ leave(); 597 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution())); 598 599 __ bind(no_deopt); 600 __ stop("deopt not performed"); 601 602 return oop_maps; 603 } 604 605 606 OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) { 607 608 const Register exception_oop = r0; 609 const Register exception_pc = r3; 610 611 // for better readability 612 const bool must_gc_arguments = true; 613 const bool dont_gc_arguments = false; 614 615 // default value; overwritten for some optimized stubs that are called from methods that do not use the fpu 616 bool save_fpu_registers = true; 617 618 // stub code & info for the different stubs 619 OopMapSet* oop_maps = NULL; 620 OopMap* oop_map = NULL; 621 switch (id) { 622 { 623 case forward_exception_id: 624 { 625 oop_maps = generate_handle_exception(id, sasm); 626 __ leave(); 627 __ ret(lr); 628 } 629 break; 630 631 case throw_div0_exception_id: 632 { StubFrame f(sasm, "throw_div0_exception", dont_gc_arguments, does_not_return); 633 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false); 634 } 635 break; 636 637 case throw_null_pointer_exception_id: 638 { StubFrame f(sasm, "throw_null_pointer_exception", dont_gc_arguments, does_not_return); 639 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false); 640 } 641 break; 642 643 case new_instance_id: 644 case fast_new_instance_id: 645 case fast_new_instance_init_check_id: 646 { 647 Register klass = r3; // Incoming 648 Register obj = r0; // Result 649 650 if (id == new_instance_id) { 651 __ set_info("new_instance", dont_gc_arguments); 652 } else if (id == fast_new_instance_id) { 653 __ set_info("fast new_instance", dont_gc_arguments); 654 } else { 655 assert(id == fast_new_instance_init_check_id, "bad StubID"); 656 __ set_info("fast new_instance init check", dont_gc_arguments); 657 } 658 659 // If TLAB is disabled, see if there is support for inlining contiguous 660 // allocations. 661 // Otherwise, just go to the slow path. 662 if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) && 663 !UseTLAB && Universe::heap()->supports_inline_contig_alloc()) { 664 Label slow_path; 665 Register obj_size = r19; 666 Register t1 = r10; 667 Register t2 = r11; 668 assert_different_registers(klass, obj, obj_size, t1, t2); 669 670 __ stp(r19, zr, Address(__ pre(sp, -2 * wordSize))); 671 672 if (id == fast_new_instance_init_check_id) { 673 // make sure the klass is initialized 674 __ ldrb(rscratch1, Address(klass, InstanceKlass::init_state_offset())); 675 __ cmpw(rscratch1, InstanceKlass::fully_initialized); 676 __ br(Assembler::NE, slow_path); 677 } 678 679 #ifdef ASSERT 680 // assert object can be fast path allocated 681 { 682 Label ok, not_ok; 683 __ ldrw(obj_size, Address(klass, Klass::layout_helper_offset())); 684 __ cmp(obj_size, (u1)0); 685 __ br(Assembler::LE, not_ok); // make sure it's an instance (LH > 0) 686 __ tstw(obj_size, Klass::_lh_instance_slow_path_bit); 687 __ br(Assembler::EQ, ok); 688 __ bind(not_ok); 689 __ stop("assert(can be fast path allocated)"); 690 __ should_not_reach_here(); 691 __ bind(ok); 692 } 693 #endif // ASSERT 694 695 // get the instance size (size is positive so movl is fine for 64bit) 696 __ ldrw(obj_size, Address(klass, Klass::layout_helper_offset())); 697 698 __ eden_allocate(obj, obj_size, 0, t1, slow_path); 699 700 __ initialize_object(obj, klass, obj_size, 0, t1, t2, /* is_tlab_allocated */ false); 701 __ verify_oop(obj); 702 __ ldp(r19, zr, Address(__ post(sp, 2 * wordSize))); 703 __ ret(lr); 704 705 __ bind(slow_path); 706 __ ldp(r19, zr, Address(__ post(sp, 2 * wordSize))); 707 } 708 709 __ enter(); 710 OopMap* map = save_live_registers(sasm); 711 int call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_instance), klass); 712 oop_maps = new OopMapSet(); 713 oop_maps->add_gc_map(call_offset, map); 714 restore_live_registers_except_r0(sasm); 715 __ verify_oop(obj); 716 __ leave(); 717 __ ret(lr); 718 719 // r0,: new instance 720 } 721 722 break; 723 724 case counter_overflow_id: 725 { 726 Register bci = r0, method = r1; 727 __ enter(); 728 OopMap* map = save_live_registers(sasm); 729 // Retrieve bci 730 __ ldrw(bci, Address(rfp, 2*BytesPerWord)); 731 // And a pointer to the Method* 732 __ ldr(method, Address(rfp, 3*BytesPerWord)); 733 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, counter_overflow), bci, method); 734 oop_maps = new OopMapSet(); 735 oop_maps->add_gc_map(call_offset, map); 736 restore_live_registers(sasm); 737 __ leave(); 738 __ ret(lr); 739 } 740 break; 741 742 case new_type_array_id: 743 case new_object_array_id: 744 { 745 Register length = r19; // Incoming 746 Register klass = r3; // Incoming 747 Register obj = r0; // Result 748 749 if (id == new_type_array_id) { 750 __ set_info("new_type_array", dont_gc_arguments); 751 } else { 752 __ set_info("new_object_array", dont_gc_arguments); 753 } 754 755 #ifdef ASSERT 756 // assert object type is really an array of the proper kind 757 { 758 Label ok; 759 Register t0 = obj; 760 __ ldrw(t0, Address(klass, Klass::layout_helper_offset())); 761 __ asrw(t0, t0, Klass::_lh_array_tag_shift); 762 int tag = ((id == new_type_array_id) 763 ? Klass::_lh_array_tag_type_value 764 : Klass::_lh_array_tag_obj_value); 765 __ mov(rscratch1, tag); 766 __ cmpw(t0, rscratch1); 767 __ br(Assembler::EQ, ok); 768 __ stop("assert(is an array klass)"); 769 __ should_not_reach_here(); 770 __ bind(ok); 771 } 772 #endif // ASSERT 773 774 // If TLAB is disabled, see if there is support for inlining contiguous 775 // allocations. 776 // Otherwise, just go to the slow path. 777 if (!UseTLAB && Universe::heap()->supports_inline_contig_alloc()) { 778 Register arr_size = r5; 779 Register t1 = r10; 780 Register t2 = r11; 781 Label slow_path; 782 assert_different_registers(length, klass, obj, arr_size, t1, t2); 783 784 // check that array length is small enough for fast path. 785 __ mov(rscratch1, C1_MacroAssembler::max_array_allocation_length); 786 __ cmpw(length, rscratch1); 787 __ br(Assembler::HI, slow_path); 788 789 // get the allocation size: round_up(hdr + length << (layout_helper & 0x1F)) 790 // since size is positive ldrw does right thing on 64bit 791 __ ldrw(t1, Address(klass, Klass::layout_helper_offset())); 792 // since size is positive movw does right thing on 64bit 793 __ movw(arr_size, length); 794 __ lslvw(arr_size, length, t1); 795 __ ubfx(t1, t1, Klass::_lh_header_size_shift, 796 exact_log2(Klass::_lh_header_size_mask + 1)); 797 __ add(arr_size, arr_size, t1); 798 __ add(arr_size, arr_size, MinObjAlignmentInBytesMask); // align up 799 __ andr(arr_size, arr_size, ~MinObjAlignmentInBytesMask); 800 801 __ eden_allocate(obj, arr_size, 0, t1, slow_path); // preserves arr_size 802 803 __ initialize_header(obj, klass, length, t1, t2); 804 __ ldrb(t1, Address(klass, in_bytes(Klass::layout_helper_offset()) + (Klass::_lh_header_size_shift / BitsPerByte))); 805 assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise"); 806 assert(Klass::_lh_header_size_mask <= 0xFF, "bytewise"); 807 __ andr(t1, t1, Klass::_lh_header_size_mask); 808 __ sub(arr_size, arr_size, t1); // body length 809 __ add(t1, t1, obj); // body start 810 __ initialize_body(t1, arr_size, 0, t1, t2); 811 __ membar(Assembler::StoreStore); 812 __ verify_oop(obj); 813 814 __ ret(lr); 815 816 __ bind(slow_path); 817 } 818 819 __ enter(); 820 OopMap* map = save_live_registers(sasm); 821 int call_offset; 822 if (id == new_type_array_id) { 823 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_type_array), klass, length); 824 } else { 825 call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_object_array), klass, length); 826 } 827 828 oop_maps = new OopMapSet(); 829 oop_maps->add_gc_map(call_offset, map); 830 restore_live_registers_except_r0(sasm); 831 832 __ verify_oop(obj); 833 __ leave(); 834 __ ret(lr); 835 836 // r0: new array 837 } 838 break; 839 840 case new_multi_array_id: 841 { StubFrame f(sasm, "new_multi_array", dont_gc_arguments); 842 // r0,: klass 843 // r19,: rank 844 // r2: address of 1st dimension 845 OopMap* map = save_live_registers(sasm); 846 __ mov(c_rarg1, r0); 847 __ mov(c_rarg3, r2); 848 __ mov(c_rarg2, r19); 849 int call_offset = __ call_RT(r0, noreg, CAST_FROM_FN_PTR(address, new_multi_array), r1, r2, r3); 850 851 oop_maps = new OopMapSet(); 852 oop_maps->add_gc_map(call_offset, map); 853 restore_live_registers_except_r0(sasm); 854 855 // r0,: new multi array 856 __ verify_oop(r0); 857 } 858 break; 859 860 case register_finalizer_id: 861 { 862 __ set_info("register_finalizer", dont_gc_arguments); 863 864 // This is called via call_runtime so the arguments 865 // will be place in C abi locations 866 867 __ verify_oop(c_rarg0); 868 869 // load the klass and check the has finalizer flag 870 Label register_finalizer; 871 Register t = r5; 872 __ load_klass(t, r0); 873 __ ldrw(t, Address(t, Klass::access_flags_offset())); 874 __ tbnz(t, exact_log2(JVM_ACC_HAS_FINALIZER), register_finalizer); 875 __ ret(lr); 876 877 __ bind(register_finalizer); 878 __ enter(); 879 OopMap* oop_map = save_live_registers(sasm); 880 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), r0); 881 oop_maps = new OopMapSet(); 882 oop_maps->add_gc_map(call_offset, oop_map); 883 884 // Now restore all the live registers 885 restore_live_registers(sasm); 886 887 __ leave(); 888 __ ret(lr); 889 } 890 break; 891 892 case throw_class_cast_exception_id: 893 { StubFrame f(sasm, "throw_class_cast_exception", dont_gc_arguments, does_not_return); 894 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true); 895 } 896 break; 897 898 case throw_incompatible_class_change_error_id: 899 { StubFrame f(sasm, "throw_incompatible_class_cast_exception", dont_gc_arguments, does_not_return); 900 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false); 901 } 902 break; 903 904 case slow_subtype_check_id: 905 { 906 // Typical calling sequence: 907 // __ push(klass_RInfo); // object klass or other subclass 908 // __ push(sup_k_RInfo); // array element klass or other superclass 909 // __ bl(slow_subtype_check); 910 // Note that the subclass is pushed first, and is therefore deepest. 911 enum layout { 912 r0_off, r0_off_hi, 913 r2_off, r2_off_hi, 914 r4_off, r4_off_hi, 915 r5_off, r5_off_hi, 916 sup_k_off, sup_k_off_hi, 917 klass_off, klass_off_hi, 918 framesize, 919 result_off = sup_k_off 920 }; 921 922 __ set_info("slow_subtype_check", dont_gc_arguments); 923 __ push(RegSet::of(r0, r2, r4, r5), sp); 924 925 // This is called by pushing args and not with C abi 926 // __ ldr(r4, Address(sp, (klass_off) * VMRegImpl::stack_slot_size)); // subclass 927 // __ ldr(r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size)); // superclass 928 929 __ ldp(r4, r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size)); 930 931 Label miss; 932 __ check_klass_subtype_slow_path(r4, r0, r2, r5, NULL, &miss); 933 934 // fallthrough on success: 935 __ mov(rscratch1, 1); 936 __ str(rscratch1, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result 937 __ pop(RegSet::of(r0, r2, r4, r5), sp); 938 __ ret(lr); 939 940 __ bind(miss); 941 __ str(zr, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result 942 __ pop(RegSet::of(r0, r2, r4, r5), sp); 943 __ ret(lr); 944 } 945 break; 946 947 case monitorenter_nofpu_id: 948 save_fpu_registers = false; 949 // fall through 950 case monitorenter_id: 951 { 952 StubFrame f(sasm, "monitorenter", dont_gc_arguments); 953 OopMap* map = save_live_registers(sasm, save_fpu_registers); 954 955 // Called with store_parameter and not C abi 956 957 f.load_argument(1, r0); // r0,: object 958 f.load_argument(0, r1); // r1,: lock address 959 960 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), r0, r1); 961 962 oop_maps = new OopMapSet(); 963 oop_maps->add_gc_map(call_offset, map); 964 restore_live_registers(sasm, save_fpu_registers); 965 } 966 break; 967 968 case monitorexit_nofpu_id: 969 save_fpu_registers = false; 970 // fall through 971 case monitorexit_id: 972 { 973 StubFrame f(sasm, "monitorexit", dont_gc_arguments); 974 OopMap* map = save_live_registers(sasm, save_fpu_registers); 975 976 // Called with store_parameter and not C abi 977 978 f.load_argument(0, r0); // r0,: lock address 979 980 // note: really a leaf routine but must setup last java sp 981 // => use call_RT for now (speed can be improved by 982 // doing last java sp setup manually) 983 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), r0); 984 985 oop_maps = new OopMapSet(); 986 oop_maps->add_gc_map(call_offset, map); 987 restore_live_registers(sasm, save_fpu_registers); 988 } 989 break; 990 991 case deoptimize_id: 992 { 993 StubFrame f(sasm, "deoptimize", dont_gc_arguments, does_not_return); 994 OopMap* oop_map = save_live_registers(sasm); 995 f.load_argument(0, c_rarg1); 996 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize), c_rarg1); 997 998 oop_maps = new OopMapSet(); 999 oop_maps->add_gc_map(call_offset, oop_map); 1000 restore_live_registers(sasm); 1001 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 1002 assert(deopt_blob != NULL, "deoptimization blob must have been created"); 1003 __ leave(); 1004 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution())); 1005 } 1006 break; 1007 1008 case throw_range_check_failed_id: 1009 { StubFrame f(sasm, "range_check_failed", dont_gc_arguments, does_not_return); 1010 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true); 1011 } 1012 break; 1013 1014 case unwind_exception_id: 1015 { __ set_info("unwind_exception", dont_gc_arguments); 1016 // note: no stubframe since we are about to leave the current 1017 // activation and we are calling a leaf VM function only. 1018 generate_unwind_exception(sasm); 1019 } 1020 break; 1021 1022 case access_field_patching_id: 1023 { StubFrame f(sasm, "access_field_patching", dont_gc_arguments, does_not_return); 1024 // we should set up register map 1025 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching)); 1026 } 1027 break; 1028 1029 case load_klass_patching_id: 1030 { StubFrame f(sasm, "load_klass_patching", dont_gc_arguments, does_not_return); 1031 // we should set up register map 1032 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching)); 1033 } 1034 break; 1035 1036 case load_mirror_patching_id: 1037 { StubFrame f(sasm, "load_mirror_patching", dont_gc_arguments, does_not_return); 1038 // we should set up register map 1039 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching)); 1040 } 1041 break; 1042 1043 case load_appendix_patching_id: 1044 { StubFrame f(sasm, "load_appendix_patching", dont_gc_arguments, does_not_return); 1045 // we should set up register map 1046 oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching)); 1047 } 1048 break; 1049 1050 case handle_exception_nofpu_id: 1051 case handle_exception_id: 1052 { StubFrame f(sasm, "handle_exception", dont_gc_arguments); 1053 oop_maps = generate_handle_exception(id, sasm); 1054 } 1055 break; 1056 1057 case handle_exception_from_callee_id: 1058 { StubFrame f(sasm, "handle_exception_from_callee", dont_gc_arguments); 1059 oop_maps = generate_handle_exception(id, sasm); 1060 } 1061 break; 1062 1063 case throw_index_exception_id: 1064 { StubFrame f(sasm, "index_range_check_failed", dont_gc_arguments, does_not_return); 1065 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true); 1066 } 1067 break; 1068 1069 case throw_array_store_exception_id: 1070 { StubFrame f(sasm, "throw_array_store_exception", dont_gc_arguments, does_not_return); 1071 // tos + 0: link 1072 // + 1: return address 1073 oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true); 1074 } 1075 break; 1076 1077 case predicate_failed_trap_id: 1078 { 1079 StubFrame f(sasm, "predicate_failed_trap", dont_gc_arguments, does_not_return); 1080 1081 OopMap* map = save_live_registers(sasm); 1082 1083 int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap)); 1084 oop_maps = new OopMapSet(); 1085 oop_maps->add_gc_map(call_offset, map); 1086 restore_live_registers(sasm); 1087 __ leave(); 1088 DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); 1089 assert(deopt_blob != NULL, "deoptimization blob must have been created"); 1090 1091 __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution())); 1092 } 1093 break; 1094 1095 case dtrace_object_alloc_id: 1096 { // c_rarg0: object 1097 StubFrame f(sasm, "dtrace_object_alloc", dont_gc_arguments); 1098 save_live_registers(sasm); 1099 1100 __ call_VM_leaf(CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)), c_rarg0); 1101 1102 restore_live_registers(sasm); 1103 } 1104 break; 1105 1106 default: 1107 { StubFrame f(sasm, "unimplemented entry", dont_gc_arguments, does_not_return); 1108 __ mov(r0, (int)id); 1109 __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), r0); 1110 } 1111 break; 1112 } 1113 } 1114 return oop_maps; 1115 } 1116 1117 #undef __ 1118 1119 const char *Runtime1::pd_name_for_address(address entry) { Unimplemented(); return 0; }